Plan basics:

Canadian fitness model Tosca Reno developed this plan when she became unhappy with her appearance and weight at age 40. It's based on moderate portions of whole, fresh foods with lean protein, complex carbs and healthy fats. Processed foods aren’t allowed.

How it works:

“Clean” foods are defined as whole, unprocessed foods as close as possible to their natural state. Calories are less important than the quality of food selected, but meal choices and portion sizes add up to a relatively low-calorie plan. Reno claims dieters will lose 3 pounds per week.

You’re advised to eat six meals per day, each containing protein and complex carbs in 200 to 300-calorie portions. You’re allowed one “cheat meal” per week.

You’ll need to avoid buying products packaged in a “box or bag” or that have more than three simple ingredients. When eating away from home, expect to prepare food in advance and take it with you.

Pros:

A focus on fresh, whole foods with lots of fruits and vegetables makes this plan healthful.

Eating high-fiber foods throughout the day cuts hunger.

Several cookbooks are available and fans share recipes on the plan’s website.

Cons:

Can be quite restrictive.

For many people, giving up all processed foods is difficult.

Eating out on this plan can be tough.

What our nutritionist says:

“Reno’s nutritional philosophy has merit, though it is stricter than necessary,” says Katherine Tallmadge, R.D. “She basically touts a Mediterranean-style diet, emphasizing home cooking, but with no processed food whatsoever."